Paul koch



UNITE STATES PATENT OFFICE.

PAUL KOCH, or NEUFFEN, wiinTnMnERe, GERMANY.

SPECIFICATION forming part of Letters Patent No. 257,723, dated May 9, 1882.

Application filed September 24, 1881. (Specimens) Patented in Germany March 24, 1881, and June 13, 1881, in Belgium April 11, 1881, in France April 12, 1881, in England Apiil E23, 1881, in Austria Mayfil, 1881, and in Hungary May .21, 188i.

To all whom it may concern:

Be it known that I, Dr. PAUL KOCH, of tNeuffen, Wiirtemberg, Germany, have invented certain new and useful Improvements in Paper-Board for Dressing \Vounds, of which the following is a specification.

The pulp employed iii the manufacture of the ordinary mill-board or pasteboard is made supple and soft bybeating it with a wooden hammer, and if exceedingly stitt'it can be further softened by subsequent treatment with some alkali. When the latter process is necessary the pulp must be roughly dried again, and, in general, all kinds of pasteboard-pulp thus treated and intended to be employed for carrying out my invention must, it moist, be well dried, it being found that nearly all pasteboard-pulp contains a large quantity of water without its being perceptible to the touch. The pulp made supple in the above manner is steeped in an alcoholic solution of about one. hundred parts of shellac, two hundred parts of hard resin, one hundred parts of turpentine made from common resin or other resiu--sucb, for example, as gum-elemi, sandarac, 8:0. The various resins are employed according to the stiffness of the product required. The steeping must take place under certain pressure in order to saturate the various thicknesses resulting from the leaf-like condition of the material. When the steeping is completed the treated pulp is placed ina drying apparatus furnished with arrangements for distilling, by which as much as possible of the alcohol employed is driven off. The dried pulp is then removed,

softened with steam, and drawn through glazing rollers between warmed zinc plates. IA product for ordinary purposes is now ready for said coatings rendering it stronger and more durable.

The product made as above is designed to be applied to wounds or fractures as a bandage, and it is steeped in warm water before using, so that it will be soft and plastic, thus enabling it to be molded by hand to conform to the shape of the wounded or injured meniber. 5

Having thus described my invention, what I claim isl. The method of preparing a pulp for dressing wounds, consisting in beating up the pulp employed in the manufacture of paste-board and then steeping the same in an alcoholic solution of shellac, resin, and turpentine, then softening the article after it has been dried, and rolling it out, as and for the purpose specified.

2. Treating the pulp employed in the manufacture of paste-board as above specified, and then coating it first with a solution of guttapercha and chloroform, secondly with a coating of alcoholic copal varnish,aud thirdly with a coating of any ordinary varnish, for the pur' pose set forth.

In testimony that I claim the loregoing as my invention I have signed my name, in presence of two witnesses, this the 13th day of August, 1881.

DR. PAUL KOCH.

, Witnesses:

EDUARD It. ll'IICZ, FR. LENZ. 

